extraction valve
1.Before steam admission, valve on vacuum hogging extraction line（the valve is befor hogging pipe of the Two Stage Steam Jet Ejector） should be closed (see also Two Stages Steam Jet Ejector Installation and Operation Instruction).
2.Smoke extraction fire fight valve refers smoke extraction system installed in the pipeline, in an open state of the gas pipeline fires when the temperature reached 280 degrees automatically closed in a certain period of time to meet the fire resistance stability and fire resistance integrity.
3.The status of the pump valve can be described precisely by a few parameters, therefore the failure feature information extraction is greatly simplified.
4.The reason of the brittle rupture of 4Cr9Si2 steel wire for valve during cold drawing after medium annealing is carefully analyzed by means of SEM/EDX, phase extraction & X-ray diffraction analysis and Thermo-Calc thermodynamic phase calculation, etc.
